I’ve been following this thread but I have been struggling to follow it. I get it as far as the Eastern Orthodox churches have an issue with the Immaculate Conception. Do they not believe that the Blessed Virgin Mary was conceived without original sin? Or, do they not believe in original sin? As an aside do the Eastern Orthodox churches not believe in the Assumption of the Blessed Virgin Mary? What is the Eastern Orthodox teaching regarding the Dormition of the Blessed Virgin Mary?
That which is lacking at birth is the “stain of original sin” in the Latin terms, or the lack of the indwelling of the Holy Spirit in other words. The consequences of “the original sin of Adam and Eve” inherited by being human still remain (we are inflicted), and there is no personal sin in the infant.
It is not necessary to do that which is not needed, so infants are baptised to give the gifts which are lacking. Saint John Chrysotsom states that infant baptism is done that infants can become the dwelling places of the Spirit.
Saint John Chrysotsom, Archbishop of Constantinople, writes in his
Baptismal Instruction 3:6:
“You have seen how numerous are the gifts of baptism. Although many men think that the only gift it confers is the remission of sins, we have counted its honors to the number of ten. It is on this account that we baptize even infants, although they are sinless, that they may be given the further gifts of sanctification, justice, filial adoption, and inheritance, that they may be brothers and members of Christ, and become dwelling places of the Spirit.”
The preservation of the Blessed Virgin Mary was that she was endowed with these gifts from the first moment of her conception. It was Duns Scotus, that gave the Latin Church the concept of
preservation, with regard to the immaculate concepton, after which there was a long debate, finally ending in the dogma being declared.
At the time the dogma refuted Pelagianism (Adam’s sin did not affect future generations, grace is only needed as a help since we can cooperate with God’s grace on our own) and Semi-Pelagianism (humanity is effected by sin, but not so much that we cannot cooperate with God’s grace on our own).
Virgin Mary, shared beforehand in the salvation Christ would bring by his death and was keep sinless from the first instance of her conception: she had the indwelling of the Holy Spirit.